body{
  background-color: #efedd6;
  width: 100%;
  overflow-x: hidden;
}
h1{
  text-align: center;
}
.myul{
  padding: 0;
}
li{
  list-style: none;
}
.item{
  width: 400px;
  height: 200px;
  border-radius: 20px;
  margin: 0 auto;
  background-color: steelblue;
  color: #efedd6;
  font-size: 36px;
  margin-bottom: 40px;
  text-align: center;
  line-height: 200px;
  transition: all .4s ease;
  font-weight: bold;
}
.item:nth-of-type(2n){
  transform: translateX(-400%);
}
.item:nth-of-type(2n+1){
  transform: translateX(400%);
}
.show{
  transform: translateX(0) !important;
}